Yom Kippur in the Bible
29) And it shall be a statute for ever unto you: in the seventh month, on the tenth day of the month, ye shall afflict your souls, and shall do no manner of work, the home-born, or the stranger that sojourneth among you.
30) For on this day shall atonement be made for you, to cleanse you; from all your sins shall ye be clean before the LORD.
31) It is a Sabbath of solemn rest unto you, and ye shall afflict your souls; it is a statute forever.
34) And this shall be an everlasting statute unto you, to make atonement for the children of Israel because of all their sins once in the year.